Origin of somatic cells and histogenesis in the primordial gonad of the Japanese tree frog Rhacophorus arboreus

The genital ridge consisted of coelomic epithelial cells and primordial germ cells

A. Tanimura

2004

Scholarcy highlights

  • The genital ridge consisted of coelomic epithelial cells and primordial germ cells
  • The gonadal medulla was formed by the segregation of epithelial cells within the primordial gonad
  • Thereafter, the medullary cell mass was well developed and oogenesis began in the gonadal cortex, irrespective of genetic sex
  • On the other hand, a layer of medullary cells comprising the epithelium of the ovarian cavity proliferated rapidly and reformed a large cell mass
  • The degeneration of ovarian follicles and the formation of cell cords were seen in the cortex. These cell cords were separated from the superficial epithelium and continued to the medullary mass
  • These results clearly indicate that both the cortical and medullary cells are derived from the coelomic epithelium and that the development of the cortex and medulla is not always antagonistic in the course of sexual differentiation

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